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What 2 prime numbers times together to make 81?
It takes four. 3 x 3 x 3 x 3 = 81
What is the HCF of 81 243 and 1215?
To find the highest common factor (HCF) of 81, 243, and 1215, we first need to find the prime factorization of each number. The prime factorization of 81 is 3^4, 243 is 3^5, and 1215 is 3^5 * 5. To find the HCF, we look for the highest power of each prime factor that appears in all the numbers. In this case, the highest power of 3 that appears in all three numbers is 3^4, so the HCF of 81, 243, and 1215 is 81.
What are the prime numbers. between 81 and 90?
The only prime numbers between 81 and 90 is... 83
What 2 prime numbers have the sum of 81?
They are: 79+2 = 81
What is 4 9ths of 81?
36 is 4 9ths of 81.
What two square numbers make 100?
81 and 9 if you add them. 4 and 25 if you multiply them.
What numbers multiply to make 81?
9 x 9 = 81 :(
What two numbers make -81?
Negative 9 times 9= Negative 81
What is the average score of 81 81 98 and 91?
It depends on what average you want to find. To find the mean of 81, 81, 98, and 91 add the numbers together and divide by 4 (the number of numbers you added). 81 + 81 + 98 + 91 = 351 351 divided by 4 = 87.75. To find the median, list the numbers in order and find the one in the middle. 81, 81, 91, 98 81 and 91 are in the middle. To find the mode, look for the number that appears the most, 81 appears twice and the other numbers appear once. 81 is the mode.
Are there 2 numbers add to make 9 and multiply to make 4?
There are not two INTEGERS that can add to make 9 and multiply to make 4, however there are some irrational numbers that will do the job. Let x and y be the two numbers. x + y = 9 xy = 4 so y = 4/x x + 4/x = 9 x² + 4 = 9x x² - 9x + 4 = 0 using the quadratic formula, x = (9 ± √[81-4(1)(4)])/2 = (9 ± √{81-16])/2 = (9 ±√65)/2 ≈ 8.531129 or 0.468871 So the two numbers are approximately 0.468871 and 8.531129
What 3 numbers make 81?
There are infinitely many different choices of 3 numbers that add up to 81. 50 + 30 + 1 = 81 40 + 40 + 1 = 81 10 + 11 + 60 = 81 etc.
What two square numbers have a difference of 77?
81 and 4
What 2 square numbers make 106?
25 and 81
What 4 numbers have 5 factors?
16, 81, 625, and 2401
What numbers can make up a square up to a 100?
1, 4, 9, 16, 25, 36, 42, 64, 81, 100
Why are 36 81 and 25 special numbers?
They are 'square' numbers. 6x6=36, 9x9=81 and 5x5=25. Some other square numbers are 64, 4, 9, 100 & 121
How many 4 digit numbers can be formed from digits 1 2 3?
There are 34 = 81 numbers.
